stay tuned

verb2

1. •
   To remain as a listener or viewer of the particular radio station or television channel to which one is currently paying attention.

   • Alerting Nigeria to stay tuned for an important announcement, the government radio station canceled its regular programs. — 1966
2. •
   To wait or remain alert (for new developments or for further information).

   • [W]riter-director Sean Penn has found a stark camera style that ignites behavioral sparks. Stay tuned; this kid has talent. — 1991